#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
// 计算 1!+2!+3!+......10!
int main()
{
    int i = 1;
    int n = 0;
    int ret = 1;
    int sum = 0;
    
    for (n = 1; n <= 10; n++)
    {
        ret = ret * n;
        sum = sum + ret;
    }
    
    printf("%d\n", sum);

    return 0;
}
